World News
An implosion”: how did the occupants of the submarine that disappeared near the Titanic die?

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Steph Deschamps / June 24, 2023
The five passengers aboard the submersible lost since Sunday in the North Atlantic, near the wreck of the Titanic, died in the “catastrophic implosion” of this small scientific tourism submarine. What does this mean in practical terms? What could have happened?
The pressure exerted by water on the walls of an appliance is a phenomenon as well-known as it is feared. “Pressure can create a crack. The water then rushes back into the cabin. This is something that should never happen, but apparently it did this time. It’s hard to imagine, but the implosion must have happened in a fraction of a second,” explains Erik Hasselman, sales manager of U-Boat Worx. Did the passengers suffer? “No, they weren’t aware of anything,” he replies.
Each time the submarine descended ten meters, the pressure increased. Titan being 3,800 meters deep, the phenomenon was very significant. “The surrounding water pressure is 380 times atmospheric pressure. So there’s a huge pressure difference between the inside of the submarine, where pressures are at atmospheric pressure to be able to survive, and the outside of the submarine. So the water is pushing extremely hard,” explains Sandra Soares Frazao, a professor at Leuven Polytechnic.
Faced with such a difference in pressure, the passengers had no chance of survival. “Imagine you’ve got a ten-meter column of water over your head all the time. Suddenly, a column of water 380 times greater, i.e. 3,800 metres, is placed on you, and you are literally crushed by this weight,” explains Sandra Soares Frazao.
An American specialist also commented on the drama. “It’s probably just luck. The glass exploded inwards in a thousandth of a second. It’s a sweeter ending than staying four days in a cold, dark, confined space,” confided Will Kohnen, chairman of the U.S. Underwater Vehicle Committee of the Marine Technology Society.
Experts are now calling for stricter standards for this type of submersible. However, testing at these depths remains highly complicated.
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World News
At least 63 employees of the UN agency for Palestinian refugees killed in Gaza

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Eva Deschamps / October 31, 2023
Since the start of the war between Israel and Hamas on October 7, 63 employees of the UN agency for Palestinian refugees (UNRWA) have already lost their lives in the Gaza Strip. Ten aid workers have been killed in the last 72 hours, according to this new toll released by the agency on its website on Monday.
At least 22 UNRWA staff were also injured. Since October 7, 44 UNRWA facilities have also been destroyed. Of its 22 health centers, only nine are still operational, the UN agency said, warning that the provision of health care is made even more difficult by the very low fuel supply.
The UN agency had previously reported that several of its warehouses had been looted. “Due to the very limited aid available and overcrowded shelters, growing tensions are being reported within the displaced communities,” it stressed. Some 672,000 refugees are living in 149 UNRWA facilities across the Gaza Strip, “in increasingly difficult conditions”. “The ability to provide vital assistance was further hampered by the 36-hour communications blackout between October 27 and 29”, UNRWA added.
In all, an estimated 1.4 million people have been displaced in the Gaza Strip. Over 120,000 of them have taken refuge in public buildings such as hospitals and schools.
“The aid currently available is insufficient to meet the most basic needs of displaced people and the communities hosting them”, warns the UN agency.
World News
Mouse embryos grown in space for the first time

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Sylvie Claire / October 31, 2023
This research into mammal reproduction in space could prove crucial for future solar system exploration missions.
Mouse embryos were grown on board the International Space Station (ISS) and developed normally, according to a Japanese study published in the scientific journal “iScience” on Saturday, October 28.
This is “the very first study to show that mammals might be able to thrive in space”, claim Yamanashi University and the Riken National Research Institute.
The researchers, including Teruhiko Wakayama, a professor at Yamanashi University’s Center for Advanced Biotechnology, and a team from the Japanese space agency Jaxa, sent frozen mouse embryos aboard a rocket to the ISS in August 2021. The astronauts thawed the embryos at an early stage, using a specially designed device, and cultured them on board the station for four days.
The experiment “clearly demonstrated that gravity had no significant effect”, noted the researchers. After analyzing the blastocysts (cells that develop into fetuses and placentas) that were returned to their laboratories on Earth, they observed no particular changes in the state of DNA and genes.
“In the future, it will be necessary to transplant blastocysts grown in microgravity on the ISS into mice to see if the mice can give birth,” in order to confirm that the blastocysts are normal, say Yamanashi University and the Riken Institute.
This research could prove crucial for future space exploration and colonization missions. As part of its Artemis program, NASA plans to send humans back to the Moon to learn how to live there in the long term, and to prepare for a trip to Mars in the late 2030s.
World News
Bobi, the world’s oldest dog, died aged 31

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Steph Deschamps / October 25, 2023
The world’s oldest dog died last weekend in Portugal. Bobi, a purebred Rafeiro de l’Alentejo, was 31 years and 165 days old, reports the British public broadcaster BBC on Monday.
Last February, Bobi entered the Guinness Book of Records as not only the oldest living dog, but also the oldest dog of all time.
The old record had been held for almost 100 years by Bluey from Australia. He died in 1939 at the age of 29 years and five months.
Bobi has spent his entire life with the Costa family in the village of Conqueiros, near the west coast of Portugal.